if i already started the normal game and download this on android do i have to start over?
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Yes, unfortunately. Though Renpy has a nice skip feature which can let you fast forward at a breakneck speed. Just enable "Skip unseen text" in the preferences first and off you go. You can skip through the entire game in ~25 minutes. The official walkthrough helps you skip through minigames faster. If you notice that you went too fast, the autosaves should have your back.
I boldly assume that you've started to consider this mod because you lost someone's path. In that case, you can fix your mistake along the way as well!